From owner-FreeBSD-net-jp@jp.freebsd.org  Thu Oct  9 11:24:25 1997
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Date: Thu, 09 Oct 1997 11:22:08 +0900
From: SATO Mitsuhide <mit-sato@scc-kk.co.jp>
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Subject: [FreeBSD-net-jp 227] Re: tcpdump packet drop
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$B:4F#$G$9!#(B

bm> $B$3$s$J>r7o$G;H$&$H(Btcpdump$B$G(Bpacket drop
bm> $B$,H/@8$9$k$+$i5$$r$D$1$J$$$H$$$1$J$$$h$H$$$&7P83B'$,$"$l$P(B
bm> $B$I$J$?$+8fHdO*$&4j$($J$$$G$7$g$&$+!)(B

$B0JA0$K(B bpf $B$r%*!<%W%s$7$FA4%Q%1%C%H$r=&$C$F$-$FE}7W$r$H$k%W%m%0%i%`$r(B
$B=q$$$?$N$G$9$,!"(BCPU $B$,9bIi2Y$J$H$-$K$O7k9=(B drop $B$,H/@8$9$k$h$&$G$9!#(B

$B$3$N%W%m%0%i%`!"(Bbpf $B$N(B buffer size $B$O(B max 32K $B$r$H$C$F$$$^$9!#(B
bpf $B$r%*!<%W%s$7$?;~$N%G%U%)%k%H$O3N$+(B 4K $B$@$C$?$H;W$&$N$G$9$,!"(B
$B$3$l$@$H$A$g$C$H$-$D$$$+$b$7$l$^$;$s!#(B
tcpdump $B$G$O(B bpf $B$N%P%C%U%!%5%$%:$r;XDj$G$-$^$7$?$C$1!)(B

CPU $B$N%9%Z%C%/!"7W;;5!$NIi2Y!"%M%C%H%o!<%/$N:.$_6q9gEy$N>r7o$K$h$C$F(B
$B$+$J$jJQ$o$C$F$/$k$H$*$b$$$^$9!#(B

$B$$$^$3$N%W%m%0%i%`$G(B ping -f $B$J$s$F$d$C$F$_$k$H(B P5-200 $B$G$b(B

   bpf: recv=188690, drop=1072(0.57%)

$B$3$N$/$i$$(B drop $B$7$^$7$?!#(B
$BCY$$%^%7%s$@$H7k9=Ha;4$J$3$H$b$"$j$^$9!#(B

--
SATO Mitsuhide // <mit-sato@scc-kk.co.jp>
